V834_Cen
The scientific goal of this proposal is to demonstrate the NEW plasma diagnostics of ``optically-thin'' thermal plasma using the ``optically-thick'' resonance photons, since the later carries the information on the plasma shape. The minimal goal is to demonstrate the anisotropic radiative transfer of resonance photons of Fe-K line in the accretion column by the spin-phase-resolved high-resolution spectra with 50 ksec observation of V834 Cen. The ideal goals is to perform the independent measurement of the density using the resonance lines in 10% accuracy and to detect the multi-temperature structure of the accretion column and constrain the plasma shape using atomic lines of O, Mg, Si, S, and Fe with 100 ksec observation.
obsid = 000159000 / Unique Observation/Sequence Number
object = V834_Cen / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 212.279776472093 / Right Ascension (Pointing Position) (deg)
dec = -45.2877463024747 / Declination (Pointing Position) (deg)
roll_angle = 110.164403190855 / Roll Angle (deg)
start_time = 2024-01-29T17:00:04 / Start Time of the Observation
stop_time = 2024-02-02T08:17:04 / Stop Time of the Observation
exposure = 189112.93750205 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date